What do you need to do first in this problem: "If 17 g of Al reacted with 13 g 02, how many moles of A1203 are produced?" 4 Al (s) + 3 02 (g) --> 2 A1203 (s) O Write a balanced reaction Determine how many and what the O given substances are and what substance is the needed one Multiply by the stoichiometric ratio Calculate the molar mass of A1203 needed to divide the grams by

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".